Synthesys Defence Systems (SDS) Limited

Active02204802 Private limited company
Incorporated
11 December 1987 (38 years)
Previously known as
Synthesys Systems Engineers Limited (until 5 March 2025)
Estagold Computers Limited (until 6 April 1988)
Industry
Other information technology service activities (62090)
Other research and experimental development on natural sciences and engineering (72190)
Other professional, scientific and technical activities n.e.c. (74909)
Accounts type
Total exemption full
Region
North West
Address
Dalmar House Barras Lane Estate
Dalston
Carlisle
CA5 7NY

Filing status

Accounts due
30 September 2027
Last accounts
31 December 2025
Conf. stmt due
10 April 2027
Last conf. stmt
27 March 2026

Charges

Total
3
Outstanding
1
Part satisfied
0
Satisfied
2

Officers 2 active

Officer details are public data from the Companies House register.

Director · Appointed 5 March 2025
British
Born October 1979 (47)
Director · Appointed 22 November 2024
British
Born February 1980 (46)
Officer history (12 former)
5 March 2025
Resigned Hartas, Gillian as Secretary
5 March 2025
Resigned Hartas, Stephen Henry John as Director
5 March 2025
Resigned Readman, Jacqueline as Director
5 March 2025
Appointed Bryant, Amy Victoria as Director
5 March 2025
Resigned Hartas, John Stephen, Dr as Director
22 November 2024
Appointed Canfield, Kurt as Director
9 May 2024
Appointed Hartas, Stephen Henry John as Director
24 May 2022
Appointed Readman, Jacqueline as Director
1 April 2020
Resigned Hudspeth, Mark Charles as Director
1 April 2020
Resigned Miller, John Christopher as Director
1 January 2018
Appointed Hudspeth, Mark Charles as Director
31 October 2017
Resigned Dolan, Elaine as Director
1 October 2017
Appointed Hartas, Gillian as Secretary
1 April 2011
Appointed Dolan, Elaine as Director
31 October 2010
Resigned Dolan, Elaine as Director
31 October 2010
Resigned Dolan, Elaine as Secretary
1 November 2008
Appointed Miller, John Christopher as Director
6 June 2007
Resigned Hartas, Karen as Director
1 January 2005
Appointed Dolan, Elaine as Director
1 December 2004
Appointed Hartas, Karen as Director
1 December 2004
Appointed Dolan, Elaine as Secretary
1 December 2004
Resigned Hartas, Karen as Secretary
14 March 1988
Resigned Hartas, Karen as Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Corporate entity · Notified 22 November 2024
Owns 75–100% of shares
Holds 75–100% of voting rights
Private Company Limited By Shares
Reg. no. 07339803
Former controllers (1)
22 November 2024
Ceased John Stephen Hartas — Owns 75–100% of shares

Group structure 4 companies

Ownership group derived from the Companies House PSC register

Synthesys Defence Systems (SDS) Limited This company Owns 75–100% of shares
Synthesys Defence Limited Owns 75–100% of shares
Synthesys Technologies Limited In liquidationOwns 75–100% of shares

Financials

Net Assets
(£323,615)
Cash
£1,158
Employees
7
Debt Ratio
366%
Current Ratio
0.3x

Trend

Net Assets
(£500k) £0 £500k £1.0M 2020 2021 2022 2023 2024 2024 £824,867 £808,660 £515,431 £110,521 £182,041 (£323,615)
Balance sheet detail
202420242023202220212020
Fixed Assets£7,399£15,574£437,363£1,111,191£1,113,161£1,109,434
Current Assets£114,109£608,976£417,327£323,400£231,310£145,605
Debtors£603,705£386,978£314,444£217,030£111,237
Cash£1,158£5,271£30,349£8,956£14,280£34,368
Creditors (< 1 year)£350,962£329,711£471,452£490,840£329,150£224,513
Creditors (> 1 year)£94,161£110,048£164,687£218,437
Net Current Assets(£236,853)£279,265(£54,125)(£167,440)(£97,840)(£78,908)
Net Assets(£323,615)£182,041£110,521£515,431£808,660£824,867
Shareholder Funds(£323,615)£182,041£110,521£515,431£808,660£824,867

Filings

Recent filings only. See the full history on Companies House

DateDescriptionMade Up ToPagesPDF
9 April 2026Confirmation statement with no updates27 March 2026
30 September 2025Total exemption full accounts31 December 2024
27 March 2025Confirmation statement with updates27 March 2025
14 March 2025Termination of appointment of a secretary
14 March 2025Previous accounting period shortened
Show all recent filings

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